The Netflix TechBlog

JUNE 4, 2019

Traditionally it has been the responsibility of the operating system’s task scheduler to mitigate this performance isolation problem. Its goal is to assign running processes to time slices of the CPU in a “fair” way. We formulate the problem as a Mixed Integer Program (MIP). So why mess with it?

Cache 251

Cache Latency Airlines Logistics 251

Testsigma

APRIL 13, 2021

Swift is a modern and latest programming language for writing code for macOS, iOS, watchOS, etc. Documented testing – With automation testing tools/frameworks, it is easier to have the whole testing process documented with screenshots, reports, test results, test run time, etc. Operating System. on an iOS device.

Testing 84

Testing Hardware Mobile Testing Tools 84

ACM Sigarch

OCTOBER 25, 2019

When it comes to hardware support to mitigate software security issues, there is a significant gap between what is available in products today and known solutions. Attestation—Providing systems the means to attest or verify the integrity of their components. hardware support for malware detection/prevention).

Hardware 98

Hardware Virtualization Architecture Games 98

The Morning Paper

MAY 27, 2019

Last week we saw the benefits of rethinking memory and pointer models at the hardware level when it came to object storage and compression ( Zippads ). The protections are hardware implemented and cannot be forged in software. And this all has to work for whole-system executions, not just the C-language portion of user processes.

C++ 61

C++ Hardware Virtualization Benchmarking 61

The Morning Paper

MAY 23, 2019

These techniques work well for scientific programs that are dominated by arrays. However, they are ineffective on object-based programs because objects do not fall neatly into fixed-size blocks and have a more irregular layout. Hotpads is a hardware-managed hierarchy of scratchpad-like memories called pads. Implications.

Cache 61

Cache Benchmarking Hardware Java 61

KeyCDN

JANUARY 23, 2020

These acronyms, which stand for real user monitoring and application performance monitoring, are software monitoring processes essential to measuring and evaluating applications in many different areas. This process should not be confused with synthetic monitoring which gathers data through synthetic transactions such as pinging a service.

Strategy 72

Strategy Metrics Monitoring Servers 72

Adrian Cockcroft

JUNE 21, 2022

I became the Sun UK local specialist in performance and hardware, and as Sun transitioned from a desktop workstation company to sell high end multiprocessor servers I was helping customers find and fix scalability problems. We had specializations in hardware, operating systems, databases, graphics, etc.

Tuning 52

Tuning Benchmarking Engineering C++ 52

KeyCDN

SEPTEMBER 20, 2018

Error tracking is the process of proactively identifying issues and fixing them as quickly as possible. Monitoring errors on the front-end requires a bit more work because front-end performance is highly dependant on the user’s hardware, software and connection. Worse still, they could start spreading the word on Twitter.

Strategy 67

Strategy Monitoring Website Google 67

Dynatrace

JANUARY 26, 2021

Traditional computing models rely on virtual or physical machines, where each instance includes a complete operating system, CPU cycles, and memory. REST APIs, authentication, databases, email, and video processing all have a home on serverless platforms. The provider is essentially your system administrator.

Serverless 242

Serverless Efficiency Lambda Azure 242

HammerDB

FEBRUARY 25, 2021

This is why the choice of programming language is so important from the outset. Database Application Logic Oracle PL/SQL SQL Server T-SQL Db2 SQL PL PostgreSQL PL/pgSQL MySQL stored program language HammerDB Stored Procedures. Top 10 Processes. CREATE PROCEDURE [dbo].[slev]. st_w_id int, @st_d_id int, @threshold int AS.

Programming 67

Programming Benchmarking Virtualization C++ 67

Randon ASCII

OCTOBER 4, 2020

The short version is that calls to timeBeginPeriod from one process now affect other processes less than they used to, but there is still an effect. First, a bit of operating-system design context. It is desirable for a program to be able to go to sleep and then wake up a little while later.

Programming 145

Programming Games Hardware Operating System 145

Dynatrace

NOVEMBER 22, 2022

Complicating the situation further, increasingly connected services are pushing more data processing to the edge. Gartner estimates that less than half of enterprise-generated data is now created and processed in data centers or the cloud. Apply AI for real-time root-cause analysis.

Infrastructure 179

Infrastructure Availability Systems Retail 179

The Morning Paper

DECEMBER 10, 2019

. …software operating on persistent data structures requires "global" pointers that remain valid after a process terminates, while hardware requires that a diverse set of devices all have the same mappings they need for bulk transfers to and from memory, and that they be able to do so for a potentially heterogeneous memory system.

Hardware 52

Hardware Virtualization Operating System Programming 52

The Morning Paper

MAY 12, 2019

An open-source benchmark suite for microservices and their hardware-software implications for cloud & edge systems Gan et al., In this paper we explore the implications microservices have across the cloud system stack. Hardware implications. Operating system and network implications. ASPLOS’19.

Open Source 61

Open Source Hardware Benchmarking Systems 61

The Morning Paper

DECEMBER 8, 2019

On the last morning of the conference Daniel Bittman presented some of the work being done in the context of the Twizzler OS project to explore new programming models for NVM. The starting point is a set of three asumptions for an NVM-based programming model: Compared to traditional persistent media, NVM is fast.

Hardware 56

Hardware Programming Media Storage 56

HammerDB

JUNE 27, 2022

It enables the user to measure database performance and make comparative judgements about database hardware and software. HammerDB has graphical and command line interfaces for the Windows and Linux operating systems. What programming languages does HammerDB use and why does it matter? Why HammerDB was developed.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

Dotcom-Montior

NOVEMBER 24, 2021

With the rapid advancements in web application technologies, programming languages, cloud computing services, microservices, hybrid environments, etc., monitoring distributed systems becomes much more difficult to carry out and manage. Each process has its own independent memory that it works with. No Shared Memory. Concurrency.

Systems 74

Systems Monitoring Hardware Network 74

Alex Russell

SEPTEMBER 20, 2020

Pre-publication gates were valuable when better answers weren't available, but commentators should update their priors to account for hardware and software progress of the past 13 years. The world didn't yet have pervasive multi-process browser sandboxing, JS JITs , or metal-speed binary isolation.

Hardware 64

Hardware Mobile Programming Java 64

Smashing Magazine

FEBRUARY 5, 2019

Although modern iOS hardware is powerful enough to handle many intensive and complex tasks, the device could still feel unresponsive if you are not careful about how your app performs. If you scroll a table view quickly, a lot of small chunks of memory will be allocated on the fly, and this process will make the UI janky!

Performance 75

Performance Energy Operating System Code 75

SQL Server According to Bob

DECEMBER 18, 2018

The operating system signals completion when the I/O stack finishes the request. Linux provides different system calls (syscall)/commands for asynchronous behavior. The data storage always uses the multi-step flush process. Linux may need similar utilities to control various hardware cache installations.

Servers 90

Servers Media Cache Storage 90

ACM Sigarch

AUGUST 20, 2018

We are used to instances of software running on different computer systems as long as some basic requirements are met (e.g., same instruction set architecture, same operating system, etc.). Similarly, we expect that most computer systems can read (and write) data that is stored in some memory.

Hardware 47

Hardware Operating System Architecture Software 47

SQL Server According to Bob

JANUARY 11, 2020

Most manufacturers' implementations immediately flush pending writes to physical disk during the restart operations. Example 1: ​​ Hardware failure (CPU board) Battery backup on the caching controller maintained the data. Important Always consult with your hardware manufacturer for proper stable media strategies.

Servers 40

Servers Cache Media Hardware 40

Testsigma

FEBRUARY 6, 2020

According to IEEE Std 829-1998, Software Testing is defined as “the process of analyzing a software item to detect the differences between existing and required conditions (i.e. The program is run and inputs are provided, the actual results are validated against expected results. ” In Dynamic Testing, the code is executed.

Software 69

Software Software Testing Scalability 69

Testsigma

JUNE 19, 2020

testing and is integratable with multiple programming languages (i.e. There are various disadvantages of using Selenium(we will discuss it later), one of them is that it requires strong technical knowledge about programming language because it’s script can only be written with the help of programming languages like Java, Python etc.

Testing Tools 60

Testing Tools Testing Open Source Java 60

O'Reilly Software

APRIL 4, 2018

We live in the era of the connected experience, where our daily interactions with the world can be digitized, collected, processed, and analyzed to generate valuable insights. Accumulating all this data to process overnight is not an option anymore. Do we need to process each record individually? Process tolerance.

Architecture 80

Architecture Scalability Google Operating System 80

Brendan Gregg

AUGUST 8, 2017

Linux load averages are "system load averages" that show the running thread (task) demand on the system as an average number of running plus waiting threads. This measures demand, which can be greater than what the system is currently processing. Nowadays, the source code to old operating systems can also be found online.

Latency 111

Latency Metrics C++ Systems 111

SQL Server According to Bob

JANUARY 11, 2020

Subsystem / Path The ​​ I/O subsystem or path ​​ includes ​​ those ​​ components ​​ that are ​​ used to support an I/O operation. DBCC Page Auditing DBCC page auditing is the process of executing common DBCC consistency checks as pages are read from disk.

Servers 40

Servers Cache Database Media 40

High Scalability

SEPTEMBER 14, 2018

events processed to date 300k+ users globally 50% of the Fortune 100 use @pagerduty 10,500+ customers of every size 300+ integrations ?? editingemily : "In peacetime, a ticketing system is great. IBM still dominates mainframes and Microsoft still dominates PC operating systems and productivity software. RachFrieee : 3.6B

Internet 30

Internet Internet Scalability Education 30

ACM Sigarch

NOVEMBER 1, 2019

This blog post gives a glimpse of the computer systems research papers presented at the USENIX Annual Technical Conference (ATC) 2019, with an emphasis on systems that use new hardware architectures. USENIX ATC is a top-tier venue with a broad range of systems research papers from both industry and academia.

Architecture 12

Architecture Hardware Cache Storage 12

High Scalability

NOVEMBER 25, 2019

Your Laptop has a filesystem used by hundreds of processes. It is limited by the disk space; it can’t expand storage elastically; it chokes if you run few I/O intensive processes or try collaborating with 100 other users. On prem data processing. Locks used for strong consistency across processes. Document store.

Architecture 52

Architecture Cache Azure Storage 52